hand #1:
No raise, pre-flop? You were in position, so you might have knocked off a small pair with raise. Limping with AJ and KJ makes me antsy.

Granted no reads on the players here, but they might have been edgy on the flop with 77 out of position, if you raised pre and bet out on the flop for value. If they called with 22, JJ, they'll probably re-raise you on the flop with their set, when you bet for value.

On the turn, he cannot have ANY idea what you have with your check. But since you checked the flop you know nothing about him either!

Can't like the raise, though. With your big stack, I probably would have called, unless he's super tight. If he's got trips, he probably bets big on the river. If he doesn't have trips, he's gettin' nervous, and might take a weak stab at it with A-mid kick, hoping you just have J's.